jit.gl.sketch and 'squary' circles
i am trying to draw circles in jit.gl.sketch but the circles seem to be a bit ‘squared’; you clearly see that is consists of multiple polygons instead of being a real circle (see image below, ignore the fact that is is not anti-aliased, that is because this shot was taken on my macbook, but can still see it)
I actually want to draw an inverse circle: So fill the entire sketch with black except leave the circle transparent, right now i am just drawing a big torus with the lighting turned off to achieve this, is there a better way? Like cutting out a circle of a rectangle.
why not create a circle texture in photoshop with an alpha channel?
The rest is also in jit.gl and the texture would have to be very large because the ‘cut-out’ circle should be able to scale from very little to very large while the rest still covers the entire window.
i think your looking for upping @shapeslice see the help on usage
Never mind the bit below, i did it in the wrong order :S
But to my second question: is there an easy way to draw a plane with the (adjustable) center cut out?
(stupid me)Looking at the help i see that i can change it, but it doesn’t seem to change anything. I tried some different values. Also in de jit.gl.sketch help-patch the shapeslice button icw a circle doesn’t seem to make it better formed.(/stupid me)
this might help:
framequad 1 1 0 1 -1 0 -1 -1 0 -1 1 0,
The last message is to reset the linewidth to its default value for any other drawing messages that might follow.
IMO, the best option for this is to use a simple shader, since it gives you the ability to scale and feather the mask without risking resolution or geometry issues. There is a "spotmask" shader included with Recipe 38: BrightLights:
Simply pass your texture through a slab with that shader loaded to generate a circular alpha mask for your texture. You might also find the shaders in the jit-shaders/transition folder useful as well.
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